# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a322792 Showing 1-1 of 1 %I A322792 #15 Feb 20 2020 13:56:03 %S A322792 2,6,4,30,8,210,36,16,2310,32,30030,900,216,64,510510,128,9699690, %T A322792 44100,1296,256,223092870,27000,512,6469693230,5336100,7776,1024, %U A322792 200560490130,2048,7420738134810,901800900,9261000,810000,46656,4096,304250263527210,8192 %N A322792 Irregular triangle read by rows where if d|n then T(n,d) = A002110(n/d)^d, where A002110(k) is the product of the first k primes. %C A322792 A reordering of A100778 (powers of primorials), these are the Heinz numbers of uniform integer partitions of length n whose union is an initial interval of positive integers. An integer partition is uniform if all parts appear with the same multiplicity. The Heinz number of an integer partition (y_1, ..., y_k) is prime(y_1) * ... * prime(y_k). %e A322792 Triangle begins: %e A322792 2 %e A322792 6 4 %e A322792 30 8 %e A322792 210 36 16 %e A322792 2310 32 %e A322792 30030 900 216 64 %e A322792 510510 128 %e A322792 9699690 44100 1296 256 %e A322792 223092870 27000 512 %e A322792 6469693230 5336100 7776 1024 %e A322792 Corresponding triangle of integer partitions whose Heinz numbers belong to the triangle begins: %e A322792 (1) %e A322792 (21) (11) %e A322792 (321) (111) %e A322792 (4321) (2211) (1111) %e A322792 (54321) (11111) %e A322792 (654321) (332211) (222111) (111111) %e A322792 (7654321) (1111111) %e A322792 (87654321) (44332211) (22221111) (11111111) %e A322792 (987654321) (333222111) (111111111) %t A322792 Table[Product[Prime[i]^d,{i,n/d}],{n,12},{d,Divisors[n]}] %Y A322792 First column is A002110. %Y A322792 Cf. A000961, A001597, A002110, A007947, A025487, A047966, A055932, A056239, A072774, A100778, A304250, A322793. %K A322792 nonn,tabf %O A322792 1,1 %A A322792 _Gus Wiseman_, Dec 26 2018 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE