Are all terms in A077087 odd? At lest, the first 181 terms up to 10^9 are. Thanks, Zak A077087 Solutions to Sigma[x+1]=3.Sigma[x]. 1, 1919, 2759, 11219, 27089, 50039, 58463, 100127, 113831, 115289, 120203, 131879, 148511, 233729