A341204 Number of ways to write n as an ordered sum of 7 nonzero decimal palindromes.

1, 7, 28, 84, 210, 462, 924, 1716, 3003, 4998, 7966, 12222, 18123, 26054, 36408, 49560, 65835, 85470, 108591, 135163, 164976, 197632, 232547, 268968, 306005, 342678, 377979, 410914, 440630, 466417, 487788, 504511, 516621, 524412, 528409, 529320, 528003, 525308, 522144

Offset

7,2

Links

Alois P. Heinz, Table of n, a(n) for n = 7..10000

Mathematica

nmax = 45; CoefficientList[Series[Sum[Boole[PalindromeQ[k]] x^k, {k, 1, nmax}]^7, {x, 0, nmax}], x] // Drop[#, 7] &

Crossrefs

Cf. A002113, A136522, A319472, A341165, A341184, A341191, A341192, A341193, A341203, A341205, A341206, A341207.

Sequence in context: A049018 A008489 A023032 * A278969 A000579 A290994

Adjacent sequences: A341201 A341202 A341203 * A341205 A341206 A341207

Keyword

nonn,base

Author

Ilya Gutkovskiy, Feb 06 2021

Status

approved