The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 4 |
| 8 | 5 |
| 9 | 7 |
| 10 | 10 |
| 11 | 14 |
| 12 | 19 |
| 13 | 26 |
| 14 | 36 |
| 15 | 51 |
| 16 | 71 |
| 17 | 98 |
| 18 | 135 |
| 19 | 188 |
| 20 | 262 |
| 21 | 364 |
| 22 | 504 |
| 23 | 699 |
| 24 | 971 |
| 25 | 1350 |
| 26 | 1874 |
| 27 | 2600 |
| 28 | 3608 |
| 29 | 5011 |
| 30 | 6959 |
| 31 | 9661 |
| 32 | 13409 |
| 33 | 18615 |
| 34 | 25846 |
| 35 | 35887 |
| 36 | 49821 |
| 37 | 69163 |
| 38 | 96018 |
| 39 | 133310 |
| 40 | 185082 |
| 41 | 256951 |
| 42 | 356722 |
| 43 | 495245 |
| 44 | 687568 |
| 45 | 954575 |
| 46 | 1325251 |
| 47 | 1839865 |
| 48 | 2554325 |
| 49 | 3546245 |
| 50 | 4923342 |
[1,1,1,1,1,2,3,4,5,7,10,14,19,26,36,51,71,98,135, 188,262,364,504,699,971,1350,1874,2600,3608,5011, 6959,9661,13409,18615,25846,35887,49821,69163, 96018,133310,185082,256951,356722,495245,687568, 954575,1325251,1839865,2554325,3546245,4923342] |