A008320 Smallest number that is not the sum of squares of two distinct earlier terms.

1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 15, 16, 18, 19, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39, 41, 42, 43, 44, 46, 47, 48, 49, 51, 54, 55, 56, 57, 59, 60, 61, 62, 63, 64, 66, 67, 69, 70, 71, 72, 74, 75, 76, 77, 78, 79, 81, 83, 84, 86, 87, 88, 89, 91, 92, 93, 94

Offset: 1

Author

R. Muller

Keywords

• nonn

Links

• Ivan Neretin, Table of n, a(n) for n = 1..10000
• Mihaly Bencze [Beneze], Smarandache Recurrence Type Sequences, Unknown source, pp. 99-102. Originally appeared in Bull. Pure Appl. Sciences.
• F. Smarandache, Sequences of Numbers Involved in Unsolved Problems.
• Eric Weisstein's World of Mathematics, Smarandache Sequences.

Crossrefs

A026468 is the version without "distinct".

Programs

Mathematica

FixedPoint[Complement[Range@100, Flatten@Table[#[[i]]^2 + #[[j]]^2, {i, Length[#]}, {j, i - 1}]] &, {}] (* Ivan Neretin, Jun 05 2016 *)

Extensions

More terms from David W. Wilson