1002385domain: NAppears in sequencesFibonacci sequence beginning 1, 21.at n=24A022391Convolution of Lucas numbers and (F(2), F(3), F(4), ...).at n=21A023619Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101.at n=15A260468