A054057 Numbers of form 41+n^2+n or 41+2*n^2.
41, 43, 47, 49, 53, 59, 61, 71, 73, 83, 91, 97, 113, 131, 139, 151, 169, 173, 197, 203, 223, 241, 251, 281, 283, 313, 329, 347, 379, 383, 421, 433, 461, 491, 503, 547, 553, 593, 619, 641, 689, 691, 743, 763, 797, 841, 853, 911, 923, 971, 1009, 1033, 1097
Offset: 1
Examples
41 + 18 =59 and 41 + 20 =61
Programs
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Mathematica
With[{nn=60},Take[Flatten[Table[{41+n^2+n , 41+2n^2},{n,0,nn}]]//Union,nn]] (* Harvey P. Dale, Aug 03 2017 *)
Extensions
More terms from James Sellers, Apr 30 2000