Triangle read by rows, A008277 * A000012.

Terms

a(0) =1a(1) =2a(2) =1a(3) =5a(4) =4a(5) =1a(6) =15a(7) =14a(8) =7a(9) =1a(10) =52a(11) =51a(12) =36a(13) =11a(14) =1a(15) =203a(16) =202a(17) =171a(18) =81a(19) =16a(20) =1a(21) =877a(22) =876a(23) =813a(24) =512a(25) =162a(26) =22a(27) =1a(28) =4140a(29) =4139