A014157 Numbers that are the sum of 2 nonnegative cubes and a triangular number.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 52, 53, 54, 55, 56, 57, 60, 61, 63, 64, 65, 66, 67

Offset

1,3

Links

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

Maple

N:= 1000: # for terms <= N
cm:= floor(surd(N, 3)): CC:= select(`<=`, {seq(seq(i^3 + j^3, j=i..cm), i=0..cm)}, N):
tm:= floor((sqrt(1+8*N)-1)/2): T:= {seq(i*(i+1)/2, i=0..tm)}:
sort(convert(select(`<=`, {seq(seq(cc+t, t=T), cc=CC)}, N), list)); # Robert Israel, Apr 17 2026

Crossrefs

Sequence in context: A351290 A374249 A244511 * A026467 A382393 A088185

Adjacent sequences: A014154 A014155 A014156 * A014158 A014159 A014160

Keyword

nonn

Author

N. J. A. Sloane

Status

approved