Squares in which the neighboring digits differ at most by 1. Neighbors of 1 are 0 and 2, neighbors of 0 are 1 and 9.
A087553
Squares in which the neighboring digits differ at most by 1. Neighbors of 1 are 0 and 2, neighbors of 0 are 1 and 9.
Terms
- a(0) =0a(1) =1a(2) =4a(3) =9a(4) =100a(5) =121a(6) =676a(7) =900a(8) =10000a(9) =12100a(10) =12321a(11) =90000a(12) =1000000a(13) =1210000a(14) =1232100a(15) =1234321a(16) =9000000a(17) =100000000a(18) =121000000a(19) =123210000a(20) =123432100a(21) =123454321a(22) =900000000a(23) =10000000000a(24) =11122233444a(25) =12100000000a(26) =12321000000a(27) =12343210000
External references
- oeis: A087553