

A055393


Sum of a square and a nonnegative cube in more than one way.


4



1, 9, 17, 36, 64, 65, 89, 100, 108, 129, 145, 196, 225, 233, 252, 289, 297, 316, 388, 441, 449, 464, 505, 512, 537, 548, 576, 577, 593, 633, 729, 730, 737, 745, 784, 792, 793, 801, 841, 873, 1000, 1025, 1088, 1090, 1116, 1225, 1289, 1296, 1304, 1305, 1367
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OFFSET

1,2


LINKS

T. D. Noe, Table of n, a(n) for n = 1..10000


EXAMPLE

a(12) = 225 since 225 = 6^3 + 3^2 = 5^3 + 10^2 = 0^3 + 15^2.


MATHEMATICA

nn = 2000; t = Table[0, {nn}]; Do[n = i^2 + j^3; If[0 < n <= nn, t[[n]]++], {i, 0, Sqrt[nn]}, {j, 0, nn^(1/3)}]; Flatten[Position[t, _?(# > 1 &)]] (* T. D. Noe, Dec 08 2012 *)


CROSSREFS

Cf. A022549, A055394.
Sequence in context: A173788 A097478 A147026 * A147082 A145941 A245542
Adjacent sequences: A055390 A055391 A055392 * A055394 A055395 A055396


KEYWORD

nice,nonn


AUTHOR

Henry Bottomley, May 12 2000


EXTENSIONS

Extended by T. D. Noe, Dec 08 2012


STATUS

approved



