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 A022549 Sum of a square and a nonnegative cube. 16
 0, 1, 2, 4, 5, 8, 9, 10, 12, 16, 17, 24, 25, 26, 27, 28, 31, 33, 36, 37, 43, 44, 49, 50, 52, 57, 63, 64, 65, 68, 72, 73, 76, 80, 81, 82, 89, 91, 100, 101, 108, 113, 121, 122, 125, 126, 127, 128, 129, 134, 141, 144, 145 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS It appears that there are no modular constraints on this sequence; i.e., every residue class of every integer has representatives here. - Franklin T. Adams-Watters, Dec 03 2009 A045634(a(n)) > 0. - Reinhard Zumkeller, Jul 17 2010 LINKS R. Zumkeller, Table of n, a(n) for n = 1..10000 - Reinhard Zumkeller, Jul 17 2010 MATHEMATICA q=30; imax=q^2; Select[Union[Flatten[Table[x^2+y^3, {y, 0, q^(2/3)}, {x, 0, q}]]], #<=imax&] (* Vladimir Joseph Stephan Orlovsky, Apr 20 2011 *) PROG (PARI) is(n)=for(k=0, sqrtnint(n, 3), if(issquare(n-k^3), return(1))); 0 \\ Charles R Greathouse IV, Aug 24 2020 (PARI) list(lim)=my(v=List(), t); for(k=0, sqrtnint(lim\=1, 3), t=k^3; for(n=0, sqrtint(lim-t), listput(v, t+n^2))); Set(v) \\ Charles R Greathouse IV, Aug 24 2020 CROSSREFS Complement of A022550; A002760 and A179509 are subsequences. Cf. A055394, A045634, A055393, A123291, A169618, A123364, A111925. Sequence in context: A166110 A087815 A248893 * A045704 A169612 A084581 Adjacent sequences:  A022546 A022547 A022548 * A022550 A022551 A022552 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified June 24 00:22 EDT 2021. Contains 345403 sequences. (Running on oeis4.)