A182274 - OEIS

A182274

Starting with 1, the smallest number not yet in the sequence such that the sum of every pair of adjacent digits in the sequence sum to a square number.

1, 3, 6, 31, 8, 10, 4, 5, 40, 9, 7, 2, 22, 27, 90, 13, 18, 81, 36, 310, 45, 400, 97, 222, 72, 79, 722, 227, 272, 279, 727, 900, 100, 101, 88, 104, 54, 540, 109, 790, 131, 313, 63, 136, 318, 181, 363, 188, 810, 401, 813, 631, 818, 881, 888, 1000, 404, 545, 409