A014155 Sum of a nonnegative cube and a triangular number.

0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 14, 15, 16, 18, 21, 22, 23, 27, 28, 29, 30, 33, 36, 37, 42, 44, 45, 46, 48, 53, 55, 56, 63, 64, 65, 66, 67, 70, 72, 74, 78, 79, 82, 85, 86, 91, 92, 93, 99, 100, 105, 106, 109, 113, 118, 119, 120, 121, 125, 126, 128, 130, 131, 132, 135, 136, 137, 140, 142, 144, 146

Offset

1,3

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

N:= 200: # for terms <= N
nC:= floor(surd(N, 3)): C:= {seq(i^3, i=0..nC)}:
nT:= floor((sqrt(1+8*N)-1)/2): T:= {seq(i*(i+1)/2, i=0..nT)}:
sort(convert(select(`<=`, {seq(seq(c+t, c=C), t=T)}, N), list)); # Robert Israel, Apr 17 2026

Crossrefs

Cf. A014156 (complement).

Sequence in context: A057906 A039214 A032866 * A263579 A166527 A380076

Adjacent sequences: A014152 A014153 A014154 * A014156 A014157 A014158

Keyword

nonn

Author

N. J. A. Sloane

Status

approved