A171675 - OEIS

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A171675

Square numbers n divisible by (at least one) sum of two positive digits of n.

36, 81, 144, 196, 256, 289, 324, 576, 676, 729, 1089, 1156, 1225, 1296, 1521, 1764, 1936, 2116, 2304, 2601, 2916, 3025, 3136, 3600, 3969, 4356, 4624, 5184, 5929, 6084, 6400, 7056, 7744, 8100, 8464, 9216, 9801, 10816, 11025, 11236, 11664, 12100, 12321

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OFFSET

1,1

COMMENTS

Subsequence of A171674.

LINKS

Table of n, a(n) for n=1..43.

EXAMPLE

12^2=144=(4+4)*18, 14^2=196=(1+7)*28, 171^2=29241=(1+2)*9747.

CROSSREFS

Cf. A005349 Niven (or Harshad) numbers: numbers that are divisible by the sum of their digits, A171674 Numbers n divisible by (at least one) sum of two positive digits of n.

Sequence in context: A279901 A335276 A271629 * A136359 A257649 A259240

Adjacent sequences: A171672 A171673 A171674 * A171676 A171677 A171678

KEYWORD

base,nonn

AUTHOR

Zak Seidov, Dec 15 2009

STATUS

approved