login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A291355 as a simple table

na(n)
01
11
20
32
44
58
60
78
816
924
100
1146
1246
1346
140
15218
161658
176542
180
190
202172
216200
220
230
240
250
260
271652
285878
2926778
300
316242
326242
336242
340
350
360
37179878
380
39169024
40472924
41603878
420
43123100
44123100
45758560
460
470
480
490
500
510
52244698
53489396
540
55495512

[1,1,0,2,4,8,0,8,16,24,0,46,46,46,0,218,1658,6542,
 0,0,2172,6200,0,0,0,0,0,1652,5878,26778,0,6242,
 6242,6242,0,0,0,179878,0,169024,472924,603878,0,
 123100,123100,758560,0,0,0,0,0,0,244698,489396,0,
 495512]