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A321354
Expansion of Product_{k>=0} (1 + x^(3^k))^(3^(k+1)).
2
1, 3, 3, 10, 27, 27, 45, 108, 108, 147, 333, 333, 480, 1107, 1107, 1467, 3294, 3294, 3801, 8109, 8109, 9300, 19791, 19791, 22644, 48141, 48141, 50806, 104277, 104277, 107011, 216756, 216756, 224937, 458055, 458055, 454437, 905256, 905256, 870777, 1707075, 1707075
OFFSET
0,2
COMMENTS
Also the coefficient of x^(3*n) in the expansion of Product_{k>=0} (1 + x^(3^k))^(3^k).
EXAMPLE
Product_{k>=0} (1 + x^(3^k))^(3^k) = 1 + x + 3*x^3 + 3*x^4 + 3*x^6 + 3*x^7 + 10*x^9 + 10*x^10 + 27*x^12 + 27*x^13 + 27*x^15 + 27*x^16 + 45*x^18 + 45*x^19 + ... .
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Nov 07 2018
STATUS
approved