A014155 -id:A014155 - cp's OEIS frontend

A014156 Numbers that are not the sum of a nonnegative cube and a triangular number.

5, 12, 13, 17, 19, 20, 24, 25, 26, 31, 32, 34, 35, 38, 39, 40, 41, 43, 47, 49, 50, 51, 52, 54, 57, 58, 59, 60, 61, 62, 68, 69, 71, 73, 75, 76, 77, 80, 81, 83, 84, 87, 88, 89, 90, 94, 95, 96, 97, 98, 101, 102, 103, 104, 107, 108, 110, 111, 112, 114, 115, 116, 117, 122

Offset: 1

N. J. A. Sloane

nonn

Cf. A014155 (complement)

Complement[Range[0, 1000], Union[Flatten[Outer[Plus, Table[n^3, {n, 0, 10}], Table[n(n+1)/2, {n, 0, 50}]]]]]

Corrected and extended by Dean Hickerson, Aug 30 2001

A307645 Numbers that are the sum of a positive triangular number and a positive cube.

Original entry on oeis.org

2, 4, 7, 9, 11, 14, 16, 18, 22, 23, 28, 29, 30, 33, 36, 37, 42, 44, 46, 48, 53, 55, 56, 63, 65, 67, 70, 72, 74, 79, 82, 85, 86, 92, 93, 99, 100, 105, 106, 109, 113, 118, 119, 121, 126, 128, 130, 131, 132, 135, 137, 140, 142, 144, 146, 147, 153, 154, 155, 161, 163, 169, 170, 172, 179

Offset: 1

Ilya Gutkovskiy, Apr 19 2019

nonn

Cf. A000217, A000578, A014133, A014155, A133254.

Exponents in expansion of (Sum_{i>=1} x^(i*(i+1)/2)) * (Sum_{j>=1} x^(j^3)).

cp's OEIS Frontend

A014156 Numbers that are not the sum of a nonnegative cube and a triangular number.

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A307645 Numbers that are the sum of a positive triangular number and a positive cube.

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