A341193 - OEIS

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A341193

Number of ways to write n as an ordered sum of 4 nonzero decimal palindromes.

1, 4, 10, 20, 35, 56, 84, 120, 165, 216, 274, 336, 399, 460, 516, 564, 601, 624, 636, 628, 609, 580, 544, 504, 463, 424, 390, 360, 345, 332, 324, 324, 327, 332, 338, 344, 350, 352, 356, 364, 361, 364, 370, 376, 382, 388, 394, 400, 402, 412, 418, 412, 418, 424, 430, 436, 442

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OFFSET

4,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 4..20000

MATHEMATICA

nmax = 60; CoefficientList[Series[Sum[Boole[PalindromeQ[k]] x^k, {k, 1, nmax}]^4, {x, 0, nmax}], x] // Drop[#, 4] &

CROSSREFS

Cf. A002113, A136522, A319469, A341157, A341191, A341192.

Sequence in context: A347252 A201722 A352208 * A090579 A276643 A000292

Adjacent sequences: A341190 A341191 A341192 * A341194 A341195 A341196

KEYWORD

nonn,base

AUTHOR

Ilya Gutkovskiy, Feb 06 2021

STATUS

approved