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”).

A064220 as a simple table

na(n)
04
118
212
312
4120
5168
672
778
8810
9312
1090
11138
12270
13948
14408
15192
16960
171920
18738
194698
20810
211872
226978
232058
243222
25570
26870
27390
289708
2914118
309378
316822
328730
332250
341008
358052
36732
375400
382910
395982
402688
4116758
421908
43258
44762
451488
4612678

[4,18,12,12,120,168,72,78,810,312,90,138,270,948,
 408,192,960,1920,738,4698,810,1872,6978,2058,3222,
 570,870,390,9708,14118,9378,6822,8730,2250,1008,
 8052,732,5400,2910,5982,2688,16758,1908,258,762,
 1488,12678]